Adjustable boring-tool holder.



No. 892,894. PATENTED JULY '7, 1908.

W. J. ROMAN.

.ADJUSTABLE BORING TOOL HOLDER. APPLIOATIONTILBD JULY 19. 190e.

WALTER J. ROMAN, OF Dl'lltOl'l,

MIMHIGAN, ASSIGNOR TO JOSEPH W. DAVIS,

or DETROIT,

MICHIGAN.

ADJUSTABLE BORING-TOOL HOLDER.

Application filed July 19,

' To all whom 'it may concern:

Be it known that I, WALTER J. ltoMAN, a citizen of the United States, residing at Detroit, county of Wayne, State of .Michigan, have invented certain new and useful lmprovements in Adjustable Boring-Tool Holders, of which the following is a specification, reference being had to the accompanying drawings, which form a part of this specification.

My invention has for its .object an adjustable boring tool` holder and it consists of the construction, combination and arrangement of devices hereinafter described and claimed and illustrated in the accompanying drawings, in which,

Figure 1 is a view in side elevation. Fig. 2 is a view in section on the line 22, Fig. 1. Fig. 3 is a view in section at' right angles to that shown in Fig. 2 through the chambered body, the tool being omitted. Fig. 4 is a cross section on the line 4-4, Fig. 3.

My invention isdesigned to provide an adjustable boring tool holder whereby a hole may be made of varying diameters. My improved holder is more especially adapted for boring tools used in boring metals. contem late, however, as coming within the scope o m invention all uses to which the same may e found a plicable. The utility of a tool holder of tllfis description will be evident.

I carry out my invention as follows:

In the drawings a represents the body of the holder, the same being provided with a shank b of any desired form, whereby the holder may be engaged in a suitable evice for service. The body of the holder is chambered longitudinally thereof as indicated at c and is provided with an open elongated slot d on the side thereof opposite the shank. Within the chamber c is located the inner end of a movable chuck or jaw e, the same being formed with a head f interiorl threaded, said head being movable longitudinally within the chamber c, as by means of an ladjusting or traversing screw g having a threaded engagement with the head of the chuck, said screw being provided with a flanged head h constructed with graduations indicated at i and with a head j, the adjacent face of the body being also provided with an index line or mark shown at k. The movable chuck is constructed in any suitable manner to ,receive a Specification of Letters Patent.

1906. Serial No. 326,836.

l gous tool l.

boring or analo- Patented July '7, 1908.

The. chuck is shown provided with a projecting arm chambered as at 'm to receive the corres ending end of the tool. 'lhe outer end of t ie chuck is shown slotted as at n, a nut 1) serving to clamp the tool in the chuck. A clamping nut q is threaded upon the projected arm binding upon the washer 1 between the nut, and the body a serves to hold the chuck in any given position in which it mayl be set. The shank?) is shown in Fig. 3 with a taper at s preferably a Brown and Sharpe taper.

It will be evident that the chuck may be adjusted on the longitudinal center of the shank b, or it may be adjusted outward l from the longitudinal center, in which case it will cut a hole of corresponding diameter.

To hold the screw (1 so that when the chuck is moved by the screw the screw will not then move backward or forward, l prefer to provide a jam nut shown in Fig. 3 at l upon the screw within said body. 'lhe flange h bearing against the end of the body will hold the screw on one side while the jam nut may be adjusted in position on the inside, so that any wear may readily be taken up.

It will be evident that the inner wall of the body serves as a guide for the inner end of the chuck.

In order to mani ulate the lock nut upon the screw within tfie chambered body, the body is provided with an orifice indicated at the numeral 4 adjacent to the lock nut whereby a in or suitable instrument may engage the lock nut to move it upon the screw.

/Vhat I claim as my invention is:

l. An adjustable boring tool holder coniprising a body having an elongated slot, a chuck member adapted to receive a tool having an outwardly extending throug said sot and slidable therein and provided with an interior-ly threaded head within said body, a traversing screw threaded through the head arranged to move said chuck in said slot, and a clamping nut threaded upon the )ro'ecting arm of the chuck adapted to fixed y liold the chuck in place.

2. An ad'ustable boring tool holder comprising a cylindrical chambered bod,Y havin@ an elongated slot, a chuck member adapted to receive a tool and having an outwardl projecting chambered arm extended throug the slot and slidable therein and rovided with an enlarged movable head filling the rojectiiw chambered arm 9 circulai` chamber of the cylindrical body, dial in the body u on the adjusting screw, said lnetrically, and a clamping nut to fixedly body provide with an opening adjacent to hold the chuck in place. the lock nut whereby the lock nut may be 15 3. An ad'ustable tool holder com. rising a i manipulated, for the purpose described.

chambered ody provided with an e onfrated In testimony whereof, I have signed this slot openin through one side thereof, ac uck specification'in the presence of two subscribconstructe with an interiorly threaded head ing witnesses.

ro`ectin throu l1 said slot and movable l lia in-th Chambr of the body, an adjustin WALTER J' ROMAN' J.

screw engaged with one end of the body an Witnessesf with the ead of the chuck, means to lock the N. S. WRIGHT,

chuck in given position, and a lock nut with- E. M. SPIELBURG. 

